Estimation of the maximum burial palaeotemperature for Toarcian and Callovo-Oxfordian samples in the central part of the Paris Basin using organic markers.

Cédric Ménétrier (1) , Marcel Élie (1) , Luis Martinez (1) , Antoine Le Solleuz (1) , Jean-Robert Disnar (2) , Cécile Robin (3) , François Guillocheau (3) , Christophe Rigollet (4)

1 G2R - Géologie et gestion des ressources minérales et énergétiques
2 ISTO - Institut des Sciences de la Terre d'Orléans
3 GR - Géosciences Rennes
4 GDF - Gaz de France

The thermal history of the central part of the Paris basin is reconstructed using C31 hopane S/R isomerisation ratios and organic matter transformation ratios measured on Lower Toarcian and Callovo-Oxfordian samples. Maximum burial palaeotemperatures range between 90 and 115 °C for the Toarcian shales, and between 75 and 95 °C for the Callovo-Oxfordian samples, from the East to the centre of the basin, respectively. The amount of Late Cretaceous erosion was evaluated to be between ca. 400 to 600 m in the eastern part of the studied area and 100 to 300 m in the centre of the basin.

Mots clés: Paris Basin; Thermal history; Biomarkers; France

Domaines: Géochimie

Cédric Ménétrier, Marcel Élie, Luis Martinez, Antoine Le Solleuz, Jean-Robert Disnar, et al.. Estimation of the maximum burial palaeotemperature for Toarcian and Callovo-Oxfordian samples in the central part of the Paris Basin using organic markers.. Comptes Rendus Géoscience, 2005, 337, pp.15, 1323-1330. ⟨10.1016/j.crte.2005.07.004⟩. ⟨hal-00023479⟩